Tack-puller for shoemakers&#39; use.



PATBNTBD JULY 25, 1905. A. B. EDMANDS. TACK PULLER POR SHOEMAKERS USB.

APPLIGATION FILED SEPT. 19. 1904.

UNITE@ STATES rafrnn'r ormoni.

TACK-FULLER FOR SHOEIVIAKEFSJ USE.

Specification of Letters Patent.

Patented July 25, 1905.

Application led September 19, 1904x Serial No. 224,972.

State of Massachusetts, have invented certain new and useful Improvements in Tack-Pullers for Shoemakers Use, of which the following, taken in connection with the accompanying drawings, is a specification.

My invention relates to tackpuliers for shoemakers use, is designed especially for removingthe lasting-tacks by which the inner sole is secured to the last, and it consists in certain novel features of construction, arrangement, and combination of parts, which will be readily understood by reference to the description of the accompanying drawings and to the claims hereto appended and in which my invention is clearly pointed out.

Figure 1 of the drawings is a plan of a tackpuller embodying' my invention. Fig. 2 is a longitudinal section on the line A A on Fig. 1 with the central spindle, the locking-pawl, and one of the gage-lingers shown in elevation. Fig. 3 is a front elevation of the same. Fig. 4 is a transverse section on line B B on Fig. 2. Fig. 5 is a transverse section on line C C on Fig. 2, the base being omitted in said Figs. 4 and 5. Fig. 6 is an elevation of the tack-pulling jaws viewed from a standpoint opposite to that of Fig. 2. Figs. 7 and 8 are respectively an elevation and a plan of the upper tack-pulling jaw. Figs. 9 and 1() are respectively a side elevation and a rear edge view of the lower tack-pulling jaw. Figs. 11 and 12 are respectively an elevation and an end view of the outer end of the gage-lingercarrying plunger.

In the drawings, 1 is' a flanged base constructed to be secured to a iiXed vertical surface 2, which may be the wall of a building or a post or column and having formed in the opposite ends thereof` two circular recesses or chambers 3 and 4, separated by the partition 5, through the center of which is formed a threaded hole to receive the stop-screw 6, as shown.

A casing 7, cylindrical in cross-section, eX- cept that it is provided with a parallel-sided lateral projection 8, which extends longitudinally thereof from near the front end of said casing' toward the rear about two-thirds of the length of said casing, said projection having a longitudinal slot 9 cut through it for the greater portion of its length and extending into the cylindrical bore or chamber 10 of said casing 7, as shown in Figs. 3, 4 and 5.

The rear end of the easing 7 is screwed into the chamber 4 of the base 1 and has formed in its rear end the circular recess 11, which is separated from the chamber 10 by the partition 12, in the center of which is formed a bearing for the spindle 13, provided near its rear end with the collar 14, which when the parts are in their normal positions abuts against said partition 12, in which position it is normally maintained by the tension of the spring 15, located in the chamber 4 between said collar 14 and said partition 5.

The chamber 10 of the casing 7 has fitted thereto so as to be movable endwise therein the plunger 16, the rear portion of which is tubular, and its front portion has its central portion cut away so as to form two prongs 17, having formed in one piece therewith or secured thereto the gage-fingers 18 18, the forward ends of which are curved inward, as shown in Fig. 1. Between the tubular and forked portions of said plunger 16 is formed a bearing for the forward end of the spindle 13 and a shoulder 19, between which and the partition 12 the spindle 13 is surrounded by the helical spring 20, which is compressed by the rearward movement of the plunger 16 and the fingers 18, thereby increasing its tension, the reaction of which is the power that vithdraws the tack from the inner sole and ast.

The front end of the spindle 13 has formed thereon a threaded section 21 and-a shoulder 22, which engages the upper tack-engaging jaw 23, to which is pivoted by the pivot-pin 24 the lower tack-engaging jaw 25, which is provided with the upwardly-projecting arm 26, as shown in Figs. 2, 6, 9, and 10. Between the two jaws 23 an'd 25 is inserted a light U-shaped spring 27 for normally holding said jaws in open position.

Within the slot 9 is pivotally mounted on the pin 28 the locking-pawl 29, provided near its front end with the shoulder 30 on its under edge arranged to engage the front upper corner of the arm 26, and with a cam-surface 31, also on its under side between its rear end and the middle of its length, which is acted upon by the pin 32, set in and projecting upward from the plunger 16 to raise the front end of said locking-pawl against the tension of the leaf-spring 33, secured at its rear end to the upper surface of the casing extension 8, as shown.

The operation of my invention is as follows: Assuming that a lasted shoe, secured to the last by a series of lasting-tacks driven through l the inner sole and into thc last with their headsprojectingoutward from the outer face of said inner sole, is presented to the operator to remove the tacks and assuming that the tack-puller is firmly secured to a fixed surface in a horizontal position and that all its parts are in the positions indicated in Figs. 1, 2, and 3, the operator takes the lasted shoe in both hands by its heel and toe, places the outer face of the inner sole against the ends of the fingers 18, with the head of the tack to'be eX- tracted between said lingers and the surface i of the sole substantially at a right angle to l the axis of the instrument, and presses the lasted shoe toward the rear of the instrument to move the lingers 18 and the plunger 16 to the rear un til the jaws and 2.5 are in contact with said inner sole without said jaws being moved from their open positions. 1f the back vard movement is continued, said jaws 23 and 25, with the spindle 13, are moved to the rear until the rear end of the spindle contacts with the inner end of the stop-screw 6, when all rearward movement is arrested, the rearward movement of the jaws 23 and 25 causing the arm 26 of the pivoted jaw 25 to be moved to the rear of the shoulder 3() of the pawl 29, thereby permitting said pawl, acted upon by the force of gravity and the tension of the spring 33, to drop till its edge at the rear of said shoulder rests upon the upper end of the arm 26, the pin 32 l'iaving been moved from beneath the curved surface 31. The rearward pressure being' removed, the reaction of the springs 15 and 2O moves the plunger 16 and the spindle 13 toward the front until the arm 26 contacts with the shoulder 30, and thereby moves the jaw 25 about the pivot 2st and causes the shank of the tack to be seized just beneath its head between said jaws 23 and 25 with a firm grip, when the forward movement of the spindle 13 and the gripping-jaws is arrested temporarily, with the collar 14 a short distance to the rear of the partition 12, while the continued reaction of the spring 2O moves the plunger 16 and fingers 18 farther toward the front, carrying` the lasted shoe therewith, and as the jaws 23 and 25 are held in a fixed position by the lockingpawl 29, with a firm grip upon the shank of the tack, said further forward movement of thc lingers 18 causes the withdrawal of the tack, and during the last part of the forward movement of the plunger 16 and when the tack is completely freed the pin 32 raises the pawl 29 to disengage the shoulder 30 from contact with the front edge of the arm 26, thereby releasing the grip of said jaws upon the tack, when the tension of the spring 15 completes the forward motion of the spindle 13, which is arrested by the collar 14C coming in contact with the partition 12, and the reaction of the lil-shaped spring 2T causes the gripping-jaws to assume their normal or open positions. The point at which the forward movement of the spindle is first arrested is' variable, as it depends upon the diameter of the shank of the tack.

That I claim as new, and desire to secure by Letters Patent of the United States, is

1. In a tack-puller, the combination of a casing adapted to be firmly secured to a fixed vertical surface; a pair of tack-gripping jaws yieldable rearwardly when pressure is applied thereto; means Vfor closing said jaws upon the tack to be withdrawn and retaining them in said closed position; a tubular and forked plunger mounted in said casing, and inclosing said gripping-jaws and their carrying-spindle; a pair of gage-lingers carried by the forked end of said plunger; and a spring for moving said plunger and fingers toward the front as and for the purposes described.

2. 1n a tack-puller, the combination of-a casing having formed in opposite ends thereof the cylindrical chambers 10 and 11 and the partition 12; a fianged base screwed to said casing and provided with cylindrical chambers in opposite ends thereof; a stop-screw set in said base and projecting into the .front chamber thereof; a tubular and forked plunger fitted to and movable end wise in the chamber 10 of said casing; a pair of gage-lingers carried by the forked end of said plunger; the spindle 13 provided with the collar 14; mounted in bearings in said casing and plunger; the jaw 23 lirmlysecured to the front end of said spindle; the jaw 25 provided with the arm 26 and pivoted to the jaw 23; a U-shaped spring inserted between the front ends of said jaws; a spring surrounding said spindle between the forward end of the chamber in said plunger and the rear end of the chamber 10; a spring surrounding the rear end of said spindle and the forward end of the stop-screw 6 between the partition 5 and the collar 14; a pivoted locking-pawl provided with the shoulder 29 and the cam-surface 31; and thepin or lug 32 carried by said plunger as and for the purposes set forth.

3. In a tack-puller, the combination of a pair of tack-grij'iping jaws pivoted together and one of which is movable about its pivotal connection to close and open said jaws; an endwise-movable spindle carrying said jaws; stops for limiting the movement of said spindle in either direction; means for moving said pivoted jaw about its pivot to close and open said jaws; a reciprocating plunger surrounding-said spindle; a spring for moving said plunger toward the front; a pair of gage-iingers carried by said plunger and adapted to yield toward the rear to a greater distance than said gripping-jaws.

il. In a tack-puller, the combination of a pair of gripping-jaws one of which is pivot-fJ ed to the other and movable about its pivotal connection, and provided with an operatingarm 26; a reciprocating spindle carrying said jaws; a spring arranged to press said spindle and jaws toward the front andto permit said jaws to yield toward the rear when pressure is applied to their front ends; stops to limit the movement of said spindle in either direction; a locking-pawl provided on its under side with a shoulder arranged to engage the arm 26 to cause said jaws to engage the shank of a tack and hold them in said engaged position; a spring arranged to press said pawl into engagement with said arm; and means for raising said pawl at a predetermined time to release the said arm; and a spring for opening said jaws to discharge the withdrawn tack.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, on this 13th day of Septemben A. D. 1904.

ARTEMAS B. EDMANDS.

Witnesses:

N. C. LOMBARD, W. L. BEMIs. 

